I really don't know how to describe this, but I know a beautiful well bred GSD that has what I would call horned ears. There may be a more appropriate term for this. Interestingly, I've met one of his litter mates and she has the same ears. Neither parent does.
The tops of the ears curve back slightly. When facing forward, you can't tell. But if the dogs ears are facing outwards and you are looking at him from the front or back, you can very easily see the curves at the top.
Is this good, bad, indifferent? Is this common in any particular line?